Improvement in variable eccentrics for steam-engine governors



UNITED STATES PATENT OEEIcE.

SAMUEL STANTON, OF NEW YORK, N. Y.

IMPROVEMENT IN VARIABLE ECCENTRICS FOR STEAM-ENGINE GOVERNORS.

Specification forming part of Letters Patent N0. 113,701, dated April 11, 1871.

To all whom it may concern:

Be it known that I, SAMUEL STANTON, of the city, county, and State of New York, have invented a new and useful Combination of a Governor and Out-Off for Steam-Engines; and I do hereby declare that the following is a full, clear,l and exact description of the same, reference being had to the accompanying drawing, and to the letters of reference marked thereon, making a part of this specification.

This invention consists in a novel manner of combining a ball-governor with the cut-off of a steam-engine, as hereinafter fully shown and described, whereby the cut-off is rendered perfectly automatic in its operation, and a regular or uniform speed of the engine insured, however variable the amount of power required of it may be.

In the accompanying drawing, Figure 1 is an elevation of my invention, partly in section. Fig. 2 is a horizontal section of the same, taken in the line x w, Fig. 1.

Similar letters of reference indicate corresponding parts in the two figures. j

A A represent the two balls of a ball-governor; B, the vertical shaft, to which the balls are connected by rods a a, pivoted to a crosshead, b, said rods being connected, by pivots c c, to rods d d, the lower ends of which are attached, by pivots c e, to a slide, O, on the shaft B, as shown in the drawing, Fig. l.

The parts above referred to constitute the ordinary and well-known ball-governor, which does not require a special description.

On the shaft B there is a cylindrical hub or boss, D, which works in a proper bearing, j', the latter supporting the shaft or serving as a guide for it. In this hub or boss there is tted, in a proper recess, a pinion, g, the axis h of which extends entirely throughv the hub or boss, and projects from it, at opposite sides, a suitable distance, the projecting ends of the axis having a screw-thread cut on them, which works in nuts fi t. (See Fig. 2.)

clearly in Fig. 1; and F is a metal strap, which encompasses the eccentric D', and to which a rod, G, is connected, which operates the cut-oli'.

From the above description it will be seen that the slide O will be raised and lowered on the shaft B in accordance with the speed of the governor, and the rack E, as it rises and falls, will turn the pinion g. The screws on the axis h of the pinion, in consequence of working in the nuts i i, will adjust the eccentric D more or less eccentric with shaft B, so

that the stroke of the rod G will be greater or lesser, in accordance with the admission of steam required in the cylinder of the engine to render .the speed uniform.

I do not cla-im, broadly, the employment of a rack and pinion and screws for automatically altering the throw of the eccentric, as this has been done; but

Vhat I claim as new is- The arrangement of the pinion g, screws It h, and nuts z' t within the eccentric, and operated, through means of a rack, by a ball-governor, having the shaft B D lc, all constructed and arran ged substantially as herein described, and constituting a variable cut-ofi'.

The above specification of my invention signed by me this 2d day of November, 1870.

SAML. STANTON.

Witnesses: I

T. B. Mosman, A. It. .HAIGHT. 

